Although he produced many brilliant recordings during this period, Parker's behavior became increasingly erratic. Heroin was difficult to obtain once he moved to California, where the drug was less abundant, so he used alcohol as a substitute. A recording for the Dial label from July 29, 1946, provides evidence of his condition. Before this session, Parker drank a quart of whiskey. According to the liner notes of Charlie Parker on Dial Volume 1, Parker missed most of the first two bars of his first chorus on the track, "Max Making Wax." When he finally did come in, he swayed wildly and once spun all the way around, away from his microphone. On the next tune, "Lover Man," producer Ross Russell physically supported Parker. On "Bebop" (the final track Parker recorded that evening) he begins a solo with a solid first eight bars; on his second eight bars, however, he begins to struggle, and a desperate Howard McGhee, the trumpeter on this session, shouts, "Blow!" at him.